Chain & Sprocket Kit Contents: 13T Front Sprocket - SPF214113C 50T Rear Sprocket - SPR48950C 120 Link RK Chain - RKP520KZX120 RK Kit Box - SPRKITBOX RK chain and sprocket kits are the perfect drive maintenance kit for your bike, including a strong and durable 13T front and 50T rear steel sprocket, constructed from SCM420 chromoly steel alloy (front) & C45 high carbon steel with a electroplated Zinc finish (rear) paired with a high-quality Heavy Duty RK chain this kit has everything you need to replace your old warped and stretched chain and sprockets. The perfect alternative to expensive OEM replacements while designed to meet and exceed OEM specifications. Supplied in presentable packaging with a carry handle for convenient transportation. About the Chain: A heavy duty non-ring chain designed specifically for road bikes as a lightweight alternative to your standard heavy duty chains the KZ series has a chromoly steel construction with seamless rollers and bushings, with oversized special alloy pins for added strength. Excellent quality and cost performance for 125-250cc road bikes. Fits: Kawasaki KX450F 2006-2013 2015-2019